Stack Cards

You control the mouse to drag and drop cards. The goal is to build stacks where the total value equals exactly 21. Number cards are worth their face value, while picture cards count as ten. The ace is flexible, valued at either one or eleven to help complete a stack. You manage multiple piles at once, deciding where to place each new card drawn from the deck. The game starts calmly but demands more attention as your table fills up, and misplacing a card can quickly end your run. It feels like a quiet, focused puzzle where each move requires a bit of mental arithmetic.